1) massive diffcult-caving roof
整体难冒顶板
2) roof collapse
顶板冒落
1.
Based on the the fully-mechanized top-coal caving mining of 8~# coal bed in Kangjiatan coal mine,the probability of the gas explosion induced by the impact-friction sparks during roof collapse was studied with the special designed experimental instruments.
针对康家滩煤矿8#煤层综放开采条件,采用专门设计的实验装置对其顶板冒落撞击摩擦火花引爆瓦斯的可能性进行了实验研究。
2.
The analytical reason of the subsidence is that old working roof collapse strengthen the vertical morenent of underground water between coal-series formation and Quaternary loose formation, the strong drain of coal mining in the area intonsify the erosion and transporting action of underground water, the Quaternary carity forms and the earthquake cause to ha.
２１＂塌陷经过和区域地质环境概况的论述，提出了其塌陷成因是由于古窑采空区顶板冒落沟通了煤系地层和第四系松散层间的地下水运动，加之区内采煤强力疏干加剧了地下水的侵蚀搬运作用，从而形成第四系松散层间的空洞，因地震诱发塌陷的观点。
3.
For roof collapse control of the belt-conveying-roadway of No.
以枣泉煤矿12205首采面胶带运输巷顶板冒落控制为背景,采用弹性力学理论计算和数值分析方法,对复杂条件下大断面巷道顶板冒落失稳机理进行分析。
3) Roof caving
顶板冒落
1.
Roof pressure,structure,water volume,support deformation that are related to the roof caving mechanism are analyzed.
通过对与顶板冒落机理有关的顶板压力、构造、涌水量、支架变形等进行分析,提出了具体的防治措施,指出随着新地质情况的出现,加强新技术、新方法研究的重要性。
2.
In order to solve the problem of roof caving of orebody in deep broken zone of Kangjiawan mine so as to realize safety mining,we performed the mechanical experiment of rocks,compared and numerically simulated the roof controlling measures,tested the mechanical parameters of rocks,analyzed and classified caving phenomenon.
为解决康家湾深部破碎带矿体顶板冒落问题,实现矿体安全回采。
4) Roof falling
顶板冒落
1.
Analysis on roof falling causes of certain mine's stope in Jiaodong area;
胶东某矿采场顶板冒落原因分析
2.
On the basis of the investigation,with the rockmass mechanics and numerical simulation, the mechanism of roof falling of stope and mined out area on a large scale are discussed compendiously.
根据近几年对石膏矿山的现场调查,结合岩体力学的相关理论和数值模拟技术,对石膏矿采场顶板冒落及大规模采空区顶板冒落机理作了简要探讨,据此提出了预防采空区冒落的措施。
3.
Especially in non-coal mine, the roof fallingaccidents have led to serious consequences.
根据国家安全生产监督管理局2005年的统计资料，矿山顶板冒落、采空区垮塌造成的人员伤亡和经济损失，仅次于煤矿瓦斯突出灾害，已经超过了道路交通事故跃升为第二位。
5) tight caving roof
难放顶板
1.
,a feasible way was found out on the management side of the strong and tight caving roofs.
七台河矿业精煤集团公司龙湖煤矿在坚硬、难放顶板的管理方面,摸索出一条可行的途径,取得了较好的效果,实现了安全放顶,为煤矿生产提供了很好的经验。
6) roof fall;roof caving
顶板陷落; 冒顶
补充资料：难夫难妻(难ｎàｎ)
一名《洞房花烛》。故事片。亚细亚影戏公司1913年摄制。郑正秋编剧，张石川、郑正秋导演。一对素不相识的青年男女，经媒婆撮合拜堂成亲，在封建礼教桎梏下开始艰难的夫妻生活。为中国第一部故事片。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条